Assighos



F. FORSHEE. GREASE-CUP. APPLICATION FILED APR. 8. 19H3.l

Patented Aug-,26, 1919.

. AYvv INVENTOR :Wray/ 17am/5er ATTORNEY yin filling' grease cups with grease'.

traites.'

FRANK FORSHEE, OF FLINT, MICHIGAN, ASSIGNOB, Y MESNE ASSIGNMENTS, TO COPEMAN DEVELOPMENTS.` COMPANY, OF FLINT,MICHIGAN, A CORPORATION 0F MICHIGAN.

' GREASE-CUP.

To allwwmitmay concern: i

Be 1t known that I F ANK FoRsHnE a n n l u citizen of the United States, residing at F lint, in the county of.Genesee and State of' Michigan, have invented a new and useful Improvement in Grease-Cups, of which thefollowing is a specification.

This invention relates to grease cups and grease capsules for use in lubricating systems, especially for automobiles. It has for its object an arrangement of capsule and grease cup so that the grease capsule may be placed in the grease cup with great `a cility and yet will tit the grease cup, so that it Will avoid the grease being driven back of the capsule against the plunger.

In the draWings,-. Figure I is a longitudinal section ot' the grease cup showing the grease capsule being placed in position.

Fig. 2 is a similar view showing the grease cup cap and plunger in position.

,Figa 3 is a similar View showing the plunger driven part Wayinto the cup and the capsule partially collapsed.

Grease capsules have been used heretofore in connection with grease cups so'tliat Igrease. may be prepared in the capsules and sold to the trade in this form, thereby eliminating the necessity ol soiling the lingers However, it is almost necessary to have a grease capsule that will nicely lit the grease cup. Otherwise the grease will drive back against. the plunger instead et being first driven out through the orifice in the grease cup. This, of course, is undesirable as it gets the plunger all greasy and the cap greasy and one is liable to soil his lingers on this. Furthermore, the grease might get past the plunger if the plunger did notl have. an ab'v solutely tight lit With the walls of the grease cup. However, the tight-fitting capsules are Very hard to place in the grease cup for ythey'are made etv material that does not -remain truly cylindrical and tends to assume an oval 'cross section, vand too, they are very often damaged and it is often almost impossible to get them into the grease cups. It is to obviate this ditlieulty and inconvenience and at the same time get all the advantages of a tight-itting capsule in ythe Way of preventing the escape of grease backward against the plunger, that this invention is designed.

Specification of Letters Paterlt.

Applicatioii'led Aprile, 1818. Serial No. 227,189.

V(L is-the customary grease cup; Z) theeusi tomary cap that screws on the top of the cup; e the screw stein, and d the plunger. j' is a capsule in the form of the frustum of a'cone.A c

Referring to Fig. l, it will `be seen that the capsule may be easily inserted notwithstanding the fact that in cross sectionitmay have assumed somewhat of. an oval shape, the smaller end giving plenty of clearance between the capsule and the'walls ot' the cup, and it may be forced down into the grease cup although the top ot the capsule may have become damaged or slightly oval, for obviously a portion of the capsule` having gone into the cup, this-will act to draw lthe rest of the capsule in when guided by the walls 'ot the cup.

W'heirthe capsule is in place, it will have.

the appearance as shown in F ig. 2, in which the top of the capsule just incely lits into the cylindrical chamber of the cup. AAs the plunger 4is pressed. against the capsule in the initial stages of the collapsing of 'the capsule, it is quite likely that the -walls ot' the capsule will be ruptured as shown in Fig. 3 due to the't'act that theconical Jform gives considerablek space between the walls et' the capsule and the walls of the cup. This will drive the material out` otA which the capsule is made tightly up against the walls of the cup near the top ot' the capsule. while the bottom of the capsulev will fold over in sort o't' an accordion-like {arrangement. This insures the steeltbut of which the capsule is made forming an etlicicnt barrier to prevent the grease from es caping back against the plunger.

It is, therefore, apparent that not only does the truste-conical shape of the capsule .make it very easy to insert thecapsule in the cup and tit it into the cup, but this truste-conical shape. results in an initial rupturel ot the capsule which makes the stock at. the top of the capsule act as a pack ing to prevent the escape of thegrease behind the capsule.

Of course, the principleof this :capsule 'could be realized without getting analosolutely true truste-conicalv shape, but' such forms 'would clearly come Withinthe principles' of' my invention.,y

vVl'iatIclaim is: p

1. A grease'cup, having in combination, a barrel provided with a cap', a plunger anni seres.7 stem passing through the cap, and a itrusto-.conioal collapsible grease capsule Whose base is substantially the diameter of the barrel, whereby clearance is lallowed for the insertion of the smaller end in the barrel and the larger end fits tightly in the barrel to act as a packing to prevent 'the escape of the grease behind the apsule. 2. A grease cup, havlng 1n comblnatlon, a, barrel provided with an outlet orlhce, a

- .truste-conical collapsibleY Ygrease capsule having itssmaller enel open and its larger end closed, the capsule being'nsertible in the open end of the barrel open end first and Ahaving the diameter of the large end of the capsule substantially that of the barrel to provide a. tight fit, and means bearing on the large end of the capsule for collapsing the same.

-In Witness whereof I have hereunto oset 20 my hand on the 1st day of April, 1918. Y FRANK FORSHEE.' 

